Difference between revisions of "CMOS"
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'''CMOS''' (Complementary Metal-Oxide Semiconductor) is a technology used in fabricating integrated circuit chips<ref>[http://en.wikipedia.org/wiki/Cmos CMOS] article at [http://en.wikipedia.org/wiki/Main_Page Wikipedia]</ref>. But in the context of photography, it is one of the two alternative technologies used in digital camera [[sensor|image sensors]]; the other being [[CCD]]s. | '''CMOS''' (Complementary Metal-Oxide Semiconductor) is a technology used in fabricating integrated circuit chips<ref>[http://en.wikipedia.org/wiki/Cmos CMOS] article at [http://en.wikipedia.org/wiki/Main_Page Wikipedia]</ref>. But in the context of photography, it is one of the two alternative technologies used in digital camera [[sensor|image sensors]]; the other being [[CCD]]s. | ||
− | Early digital cameras tended to use CCD sensors, as this was the more mature technology. The evolution of CMOS sensors had a steeper learning curve, and originally their use was confined to lower-cost products where image quality was not an overriding concern. However [[Canon]] and [[Sony]] refined CMOS sensors through several generations; today (2011) when comparing sensors of equal size, CMOS sensors generally exceed CCDs in image quality measures<ref>[ | + | Early digital cameras tended to use CCD sensors, as this was the more mature technology. The evolution of CMOS sensors had a steeper learning curve, and originally their use was confined to lower-cost products where image quality was not an overriding concern. However [[Canon]] and [[Sony]] refined CMOS sensors through several generations; today (2011) when comparing sensors of equal size, CMOS sensors generally exceed CCDs in image quality measures<ref>[https://www.dxomark.com/Cameras/ DxO Mark Sensor Rankings] at [https://www.dxomark.com/ DxO Mark]</ref>. |
Typically a CMOS design uses active circuitry placed on directly on the chip itself, which can speed image readout and help with noise reduction. The added circuit complexity does increase the up-front costs to the chip developer; thus we see sensor manufacturer [[Sony]] trying to recoup some of those costs by selling sensor chips to its nominal competitors in the camera market: Pentax, Nikon, Leica, etc. | Typically a CMOS design uses active circuitry placed on directly on the chip itself, which can speed image readout and help with noise reduction. The added circuit complexity does increase the up-front costs to the chip developer; thus we see sensor manufacturer [[Sony]] trying to recoup some of those costs by selling sensor chips to its nominal competitors in the camera market: Pentax, Nikon, Leica, etc. | ||
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As HD video has increasingly been seen as a must-have bullet point in digital camera sales, the speed advantage of CMOS chips has helped make them the default choice in new camera designs. | As HD video has increasingly been seen as a must-have bullet point in digital camera sales, the speed advantage of CMOS chips has helped make them the default choice in new camera designs. | ||
− | ==Notes | + | ==Notes== |
<references/> | <references/> | ||
[[Category: Camera parts]] | [[Category: Camera parts]] | ||
[[Category: Digital]] | [[Category: Digital]] |
Latest revision as of 05:00, 13 May 2023
CMOS (Complementary Metal-Oxide Semiconductor) is a technology used in fabricating integrated circuit chips[1]. But in the context of photography, it is one of the two alternative technologies used in digital camera image sensors; the other being CCDs.
Early digital cameras tended to use CCD sensors, as this was the more mature technology. The evolution of CMOS sensors had a steeper learning curve, and originally their use was confined to lower-cost products where image quality was not an overriding concern. However Canon and Sony refined CMOS sensors through several generations; today (2011) when comparing sensors of equal size, CMOS sensors generally exceed CCDs in image quality measures[2].
Typically a CMOS design uses active circuitry placed on directly on the chip itself, which can speed image readout and help with noise reduction. The added circuit complexity does increase the up-front costs to the chip developer; thus we see sensor manufacturer Sony trying to recoup some of those costs by selling sensor chips to its nominal competitors in the camera market: Pentax, Nikon, Leica, etc.
As HD video has increasingly been seen as a must-have bullet point in digital camera sales, the speed advantage of CMOS chips has helped make them the default choice in new camera designs.